Swine expert Robert Morrison was killed when his vehicle collided with a semi near Prague. He was on his way to a swine conference in the Czech Republic.
His wife and several companions were traveling with him.
A trade magazine says two women were also killed in the crash, including one from Pipestone, Minn.. The publication says Morrison's wife, Jeanie, was critically injured.
Morrison worked for the University of Minnesota's College of Veterinary Medicine. A one-time practicing veterinarian, he joined the university in 1986 and was an expert in the health of farm pigs around the world.
U officials said he'd recently launched a swine health monitoring initiative that tracked the health of more than half the sow herds in the U.S.. He also headed a four-day, international vet conference in St. Paul and had started another in China.